David Scott Segletes

US Patent:

8266800, Sep 18, 2012

Filed:

Sep 10, 2004

Appl. No.:

10/938713

Inventors:

David Scott Segletes - Oviedo FL, US
Brij B. Seth - Maitland FL, US
Srikanth C. Kottilingam - Orlando FL, US
Peter Jon Ditzel - Orlando FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

B23P 6/00

US Classification:

298891, 2940206, 2940208, 2940211, 2940213, 2940218

Abstract:

A method of adding material to a nickel-based superalloy component, such as a gas turbine rotor disk, without damaging the underlying material and without creating an unacceptable level of cracking. The method is advantageously applied in the repair of Alloy 706 turbine rotors having experienced operating failures in the steeple region of the disk. Once the damaged material is removed, replacement nickel-based superalloy material is added using a welding process that protects both the underlying material and the replacement material. The replacement material may be added by welding, with the preheat temperature maintained no lower than 100 C. below the aging temperature of the deposited alloy and with the interpass temperature maintained below the solution annealing temperature of the alloy. Alternatively, the replacement material may be preformed and welded to the original material using a friction welding process. In one embodiment, a replacement steeple of directionally solidified or single crystal material is installed onto a disk hub using a linear friction welding technique.

US Patent:

8568855, Oct 29, 2013

Filed:

Jun 8, 2011

Appl. No.:

13/155456

Inventors:

David S. Segletes - York SC, US
Zhaohui Han - Oviedo FL, US

Assignee:

Siemens Energy, Inc. - Orlando FL

International Classification:

B32B 3/24

US Classification:

428137, 428138, 2191217

Abstract:

An improved electrical insulation tape () comprising a backing layer () and an electrical insulation layer () bonded to the backing layer () is provided. At least one of the electrical insulation layer () and the backing layer () includes a plurality of apertures () formed therein to improve flow of impregnating resin into the insulation tape () during resin impregnation.

US Patent:

20060008352, Jan 12, 2006

Filed:

Jul 7, 2004

Appl. No.:

10/885989

Inventors:

David Segletes - Oviedo FL, US
Michael Hoelzel - Charlotte NC, US

International Classification:

F03B 1/02

US Classification:

41624400A, 41624400R

Abstract:

A composite turbine disc includes a high nickel rim section and a steel bore section. The rim section is formed from a high nickel alloy which provides a higher melting point as compared to the material used for the bore section. A plating or forged welding enhanced agent layer is disposed between the bore section and rim section. Composite disc can be formed by forging the rim and bore material together, or by welding the rim and bore material together.

US Patent:

20070181550, Aug 9, 2007

Filed:

Feb 7, 2007

Appl. No.:

11/703472

Inventors:

David S. Segletes - York SC, US
Dennis R. Amos - York SC, US

International Classification:

B23K 9/23

US Classification:

219137WM

Abstract:

The present invention provides for the welding of copper using activated TIG welding (). In particular, the copper coils () of electrical generators () are welded using the present invention.

US Patent:

20110031301, Feb 10, 2011

Filed:

Aug 6, 2009

Appl. No.:

12/536893

Inventors:

David S. Segletes - York SC, US
William F. Jones - York SC, US

International Classification:

B23K 31/02

US Classification:

228198

Abstract:

A method for joining components to be used in an electrical generator. First and second components are provided. The first and second components are preheated and a reactive bonding material is disposed between and in contact with the first and second components. The reactive bonding material includes a first material, which is a brazing material, and a second material that is capable of melting the first material upon an initiation of an exothermic reaction in the second material. An exothermic reaction is initiated in the second material to effect a release of thermal energy from the second material to melt the first material. Upon a cooling and solidification of the first material, the first material creates a bond between a first surface of the first component and a second surface of the second component to join the first and second components together.

US Patent:

20120293168, Nov 22, 2012

Filed:

May 17, 2011

Appl. No.:

13/109183

Inventors:

David S. Segletes - York SC, US
Erik A. Lombardo - Sharon SC, US

International Classification:

G01N 27/82

US Classification:

324220

Abstract:

A non-destructive inspection system that has particular application for inspecting a bore in a valve for defects. The system includes an inspection yoke having a ferromagnetic core, where a first coil is wound around the core in one direction and a second coil is wound around the core in an orthogonal direction so that orthogonal electromagnetic fields can be generated within the bore. A controller provides a current flow through the coils to generate the electromagnetic fields to detect defects in the bore.

US Patent:

20160123932, May 5, 2016

Filed:

Oct 30, 2014

Appl. No.:

14/527826

Inventors:

- Orlando FL, US
Michael F. Fair - Oakmont PA, US
David S. Segletes - York SC, US
Erik A. Lombardo - Sharon SC, US
Scott M. Westby-Gibson - Charlotte NC, US
Waheed A. Abbasi - Murrysville PA, US

International Classification:

G01N 29/11
G01N 29/04
F01D 21/00

Abstract:

A method for scanning a weld buildup formed on a circumferential portion of a disc for a steam turbine. The method includes providing an ultrasound probe for generating at least one ultrasound beam sweep. The circumferential portion is scanned with a first beam sweep oriented in a first beam orientation to detect a first flaw type in the weld buildup. The circumferential portion is also scanned with a second beam sweep oriented in a second beam orientation to detect a second flaw type in the weld buildup. Further, the circumferential portion is scanned with a third beam sweep oriented in a third beam orientation to detect a third flaw type in the weld buildup. The method also includes rotating the disc about a disc axis during scanning of the circumferential portion and moving the first, second and third beam sweeps in a direction parallel to the disc axis during scanning.

US Patent:

20150225834, Aug 13, 2015

Filed:

Feb 12, 2014

Appl. No.:

14/178396

Inventors:

- Munich, DE
David S. Segletes - York SC, US
Steffan Walter - Oberpframmern, US
Niels Van der Laag - Munchen, DE

Assignee:

Siemens Aktiengesellschaft - Munich

International Classification:

C23C 8/42
C23C 8/68
C23C 8/70
C23C 8/80

Abstract:

Disclosed are new boronizing compositions consisting of boron fluoride and boron oxide, borax, or an iron boride. The compositions reduce the heating temperature and time. Further disclosed are methods of boronizing a metal substrate including these compositions, or any combination thereof.